CVE-2020-12458
Description
An information-disclosure flaw was found in the way Grafana set permissions for the database directory and file. This flaw allows a local attacker access to potentially sensitive information such as cleartext or encrypted datasource passwords from /var/lib/grafana/grafana.db.
Statement
The versions of grafana shipped with Red Hat Gluster Storage 3, Red Hat Ceph Storage 3 and 4 sets the world readable permissions on grafana database directory and file, hence affected by this vulnerability.
In both OpenShift Container Platform (OCP) and OpenShift ServiceMesh (OSSM), the grafana containers set their database files to world readable. However, as it's run in a container image with SELinux MCS labels this prevents other processes on the host from reading it. Therefore, for both (OCP and OSSM) the impact is low.
Mitigation
Manually change the directory and files permissions to remove readable bits for others:
# chmod 750 /var/lib/grafana
# chmod 640 /var/lib/grafana/grafana.db
# chown grafana:grafana /var/lib/grafana/grafana.db
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 6.2 | 5.5 | N/A |
| Attack Vector | Local | Local | N/A |
| Attack Complexity | Low | Low | N/A |
| Privileges Required | None | Low | N/A |
| User Interaction | None | None | N/A |
| Scope | Unchanged | Unchanged | N/A |
| Confidentiality | High | High | N/A |
| Integrity Impact | None | None | N/A |
| Availability Impact | None | None | N/A |
Vector
Red Hat: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
NVD: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Understanding the Weakness (CWE)
Confidentiality
Technical Impact: Read Application Data; Read Files or Directories
An attacker may be able to read sensitive information from the associated resource, such as credentials or configuration information stored in a file.
Access Control
Technical Impact: Gain Privileges or Assume Identity
An attacker may be able to modify critical properties of the associated resource to gain privileges, such as replacing a world-writable executable with a Trojan horse.
Integrity,Other
Technical Impact: Modify Application Data; Other
An attacker may be able to destroy or corrupt critical data in the associated resource, such as deletion of records from a database.
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